Grade 1 titanium plates with both symmetrically and anti-symmetrically
waisted cracks were due to tension tests first to receive the load vs.
displacement diagrams and mechanical properties of strength and
stiffness. Next from cyclic tests the load vs. cycles curves were
constructed and fatigue life obtained. The numerical results of crack
growth and life were obtained by using the finite element method and
ANSYS workbench. From fracture mechanics the critical crack length was
considered as final failure, then the modified numerical results were
received. The results in load vs. cycles curves from two numerical
method were found within acceptable errors with the experimental data.